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Reconfigurable and writable magnetic charge crystals

United States Patent

9,711,201
July 18, 2017
View the Complete Patent at the US Patent & Trademark Office
Artificial ices enable the study of geometrical frustration by design and through direct observation. It has, however, proven difficult to achieve tailored long-range ordering of their diverse configurations, limiting both fundamental and applied research directions. An artificial spin structure design is described that produces a magnetic charge ice with tunable long-range ordering of eight different configurations. A technique is also developed to precisely manipulate the local magnetic charge states and demonstrate write-read-erase multi-functionality at room temperature. This globally reconfigurable and locally writable magnetic charge ice provides a setting for designing magnetic monopole defects, tailoring magnetics and controlling the properties of other two-dimensional materials.
Wang; Yong-Lei (Westmont, IL), Xiao; Zhi-Li (Naperville, IL), Kwok; Wai-Kwong (Downers Grove, IL)
UCHICAGO ARGONNE, LLC (Chicago, IL), BOARD OF TRUSTEES OF NORTHERN ILLINOIS UNIVERSITY (Dekalb, IL)
15/ 280,915
September 29, 2016
STATEMENT OF GOVERNMENT INTEREST This invention was made with government support pursuant to Contract No. DE-AC02-06CH11357 between the United States Department of Energy and UChicago Argonne, LLC, as operator of Argonne National Laboratory, and under National Science Foundation Award No. DMR-1407175. The government has certain rights in the invention.